Molding-machine.



A. BRAKE.

MOLDING MACHINE. APPLICATION I'ILED SEPT. 23, 1911. nmmwnn APR. 1. 1914.

Patented June 2 INVENTOR. M. @4 14, BY Qua/WM ATTORNEY.

2 SHEETS-SHEET l.

IUUU'UUUUUUUUUUUUUWUUUIT 0LUMIIA FLANOOIAPH c0.. WASHINGTON. D. C.

A. BRAKE.

MOLDING MACHINE.

APPLICATION FILED SEPT. 23, 1911. RENEWED APR, 1. 1914.

1,099,01 2, Patented June 2, 19141 2 SHEETS-SHEET 2.

[ VITNESSES: INVENTOR.

A TTORN E Y.

COLUMBIA PLANOGRAPH c0., WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

ARCHIIBALD BRAKE, OF TORONTO, ONTARIO, CANADA, ASSIGNOR 0F ONE-HALF 'IOARCHIBAL-D A. DICKSO-N, OF TORONTO, CANADA.

MOLDING-MACHINE.

Specification of Letters Patent.

Patented June 2, 1914.

Application filed September 23, 1911, Serial No. 650,922. Renewed April1, 1914. Serial No. 828,906.

To all whom it may concern:

Be it known that I, ARCHIBALD BRAKE, of the city of Toronto, in theProvince of Ontario, Canada, have invented certain new and usefulImprovements in Molding-Machines, of which the following is aspecification.

This invention relates to apparatus adapted particularly for moldingsuch articles as cast metal pipes and the like, and my object is todevise a machine which will reduce the hand labor in molding to aminimum and which will produce a clean compactly and evenly rammed mold.

I attain my object by means of the construction hereinafter describedand illustrated in the accompanying drawings in which- Figure 1 is avertical longitudinal section of the apparatus. Fig. 2 is a plan View ofthe same with the box open. Fig. 8 is a vertical cross-section with ahalf flask in position on the box. Fig. 4: is a vertical crosssection ofa part of the apparatus with the box open and a scraper in place. Fig. 5is an end view of part of the apparatus. Fig. 6 is a detail partly inside elevation and partly in section illustrating the means for liftingthe half pattern. Fig. 7 is a vertical cross-section illustrating theapplication of power to compress 0r pack the sand in the half flask.

A is a follower board which is preferably shaped as a hollow rectangularblock to guide the vertically movable box B which is formed with sidesand ends only. On the follower board is set the pattern of which onlyhalf projects above the surface of the follower.

In the drawings a pattern 0 is shown for a gas or water pipe and forconvenience this is turned up as a whole pattern with a core print ateach end and projecting half way through a removable plate J which issuitably supported to close the upper side of the hollow rectangularblock forming the follower board.

The pattern is supported on two or more connecting rods K which areactuated by the eccentrics L carried by the shaft M journaledlongitudinally of the machine preferably provided with a crank handle N.By turning the shaft M the eccentric L may be actuated to push up therods K and thus the pattern may be lifted when desired to facili- Bateits removal from the machine.

The ends of the box 13 above the level to which the molding sand will beswept is cut away in semi-circular form, as shown, leavmg at each endthe semi-circular projections D D, concentric with the pipe ends. Thesocket end of the pipe being naturally larger than the spigot end, thesemi-circular proection D at the socket end is of greater radius thanthe projection D at the spigot end in order that the same thickness ofsand may surround the socket end as surrounds the spigot end and body ofthe pipe.

lVith the device a number of half flasks E are employed. Each half flaskin shape approximates interiorly the exterior section of the pipe beingmolded, allowing, of course, for sufficient thickness of sand.

The apparatus as far as described is used in the following manner: Withthe parts in the position shown in Figs. 1 and 3 the mold is loosely andevenly filled with sand. The mold is then swept by means of the scraperF shown in Figs. 4 and 5. This scraper is provided with shoulders G torest on the edges of the box and is shaped at one end approximately thesize and shape of one of the semi-circular projections D and at theother end to approximately the size and shape of the semi-circularprojection D at the other end of the box. The end of the mold over thesocket end of the pipe is swept with the end of the scraper having thecurve of larger radius while the rest of the mold is swept by the otherend of the scraper. An even thickness of sand is thus obtained over thepattern. A half flask E is then placed in position on the box and lockedthereon by means of any suitable removable clamps. The box and flask arethen forced down by hand to the position shown in Fig. 3 andsubsequently by power mechanism until the lower edge of the half flaskis level with the upper edge of the follower board. The mechanism formoving the box by hand and by power will hereinafter be described. Thesand by the actions just described is thoroughly packed in half flask Eso that no hand ramming is needed. As the greatest difliculty isexperienced in packing the sand around the sides of the pattern I form ashoulder H on the half flask which tends to push down the sand into thespace at each side of the pattern. This sand is further packed by meansof a series of wedges I which by means of their pointed ends press thesand longitudinally of the mold where their inner faces being somewhatinclined tend also to pack the sand in toward the pattern. The tightpacking of the sand at the parting face of the half flask is of theutmost importance and by means of longitudinal ribs H of the transversewedges, this is accomplished very effectively. After the last stepdescribed the half flask may be removed and a new half mold formed byrepeating the process. Two half flasks thus form a complete mold intowhich the core is inserted and which is poured in the usual manner.

The preliminary downward movement of the box B is given by means of thefollowing mechanism: A transverse shaft 0 has a hand lever P securedthereto by means of which it may be rocked. This shaft carries the rockarms Q connected respectively by means of the connecting rods (4 withrock arms R and transverse shafts S journaled transversely at each endof the machine. These shafts S each carry a pair of rock arms Tconnected by means of pivoted links I) with the box B. It is evidentthat by rocking the lever P the box may be raised and lowered asdesired. This hand operating mechanism does not, however, givesufficient power for the final packing of the sand, merely suflicing tobring the half flask down to within one half or five-eighths of an inchof its lowermost position. To enable the power to be applied for thefinal compression I provide the yoke U which is adapted to engage thetop of a half flask when the latter is in position. The top of each halfflask is provided with a flat 0 extending from end to end, as shownparticularly in Fig. 1.

The ends of the yoke U are journaled on wrist pins on the crank disks Vcarried by the shaft W j ournaled longitudinally of the machine. Thisshaft carries a gear wheel (Z meshing with a pinion e on the shaft fwhich will be oriven from any suitable source of power. It will be seen,of course, that some controlling means in the form of a clutch beemployed, so that the shaft f may be actuated at such times as may benecessary to raise and lower the yoke U. Such controlling mechanism willbe of ordinary construction and forms no part of the present invention.

It will be evident that from the construction described that ample powermay be obtained to force the half flask E down to complete the packingof the sand therein which had been commenced by hand.

lVhat I claim as my invention is 1. In molding apparatus the L mbinationof a follower board having a r pattern projecting above its uppersurface; an opentop box inclosing said follower board and verticallymovable relative thereto, the ends of the box having substantiallysimilar vertical contours to the ends of the half pattern but of greaterdimensions; and a half flask adapted to be detachably secured to theupper edges of the box, the half flask having its cross sectionalcontours substantially similar to those of the half pattern.

2. In molding apparatus the combination of a follower board; an open-topbox inclosing said follower board and vertically movable relativethereto; a half flask adapted to be detachably secured to the upperedges of the box; means for raising and lowering said box; a pivotedyoke adapted to be swung over the top of the half flask when the box isnear its lowest position; and means for vertically reciprocating saidyoke.

3. In molding apparatus the combination of a follower board having ahalf pattern projecting above its upper surface; an opentop boxinclosing said follower board and vertically movable relative thereto,the ends of the box having substantially similar vertical contours tothe ends of the half pattern but of greater dimensions; a half flaskadapted to be detachably secured to the upper edges of the box, the halfflask having its cross sectional contours substantially similar to thoseof the half pattern; and a series of transverse projections along eachside of the interior of the half flask to serve as packers for themolding sand.

at. In molding apparatus the combination of a follower board; anopen-top box inclosing said follower board and vertically movablerelative thereto; a half flask adapted to be detachably secured to theupper edges of the box, and a longitudinal shoulder formed at each sideof the half flask above the lower edge thereof and adapted to press themolding sand toward the pattern.

5. In molding apparatus the combination of a follower board; an open-topbox inclosing said follower board and vertically movable relativethereto; a half flask adapted to be detachably secured to the upperedges of the box, and a longitudinal shoulder formed at each side of thehalf flask adapted to press the molding sand toward the pattern, andaseries of transverse projections along each side of the interior of thehalf flask to serve as packers for the molding sand.

6. In molding apparatus the combination of a follower board having ahalf pattern projecting above its upper surface and convexly curved incross section; an open topbox inclosing said follower board andvertically movable relative thereto, the ends of the box havingsubstantially similar vertical contours to the ends of the half patternbut of greater dimensions; a half flask adapted to be detachably securedto the upper edges of the box, the half flask having its cross sectionalcontours substantially similar to those of the half pattern; and aseries of transverse projections along each side of the interior of thehalf flask to serve as packers for the molding sand.

7 In molding apparatus the combination of a follower board having a halfpattern projecting above its upper surface and convexly curved in crosssection; an open topbox inclosing said follower board and verticallymovable relative thereto, the ends of the box having substantiallysimilar vertical contours to the ends of the half pattern but 15 ofgreater dimensions; a half flask adapted to be detachably secured to theupper edges of the box, the half flask having its cross seep tionalcontours substantially similar to those of the half pattern; alongitudinal shoulder formed at each side of the half flask adapted topress the molding sand toward the pattern; and a series of transverseprojections along each side of the interior of the half flask to serveas packers for the molding sand.

Toronto this 16th day of September 1911.

AROHIBALD BRAKE. Signed in the presence of- A. CAMPBELL, E. P. HALL.

Copies of this patent may be obtained for five cents each, by addressingthe Gommissioner of Patents, Washington, D. G.

